TTB vs. THE WORLD (AKA differences between Ford TTB axles)
- philofab
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TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Ford made five different flavors of the TTB axle.
The Dana 28, 35, 44, 44HD, and 50.
Dana 28:
* 1983-1997 Ranger
* 1984-1990 Bronco II
* 1994-1997 Mazda B3000 + B4000
Ring Gear Diameter: 6.625
Ring Gear Bolts: (10) 3/8 x 24 RH
Cover Bolts: 12
Carrier Breaks: 3.45 / 3.73
Spline Count: 27
Pinion Support: False
Axle Lugs: 5x4.5
Center section is aluminum
Dana 35:
* Some 1990 Bronco IIs
* 1991-1994 Explorer
* 1990-1997 Ranger
* 1994-1997 Mazda B3000 + B4000
Dana 44:
1980-1996 1/2 Ton F150 & Bronco
Reverse rotation high pinion
Center section is steel
Ring Gear Diameter: 8.5"
Ring Gear Bolts: (10) 3/8" X 24RH
Cover Bolts: 10
Carrier Breaks: 3.73/3.92
Spline Count: 30
Pinion Support: False
Axle Lugs: 5x5.5
Dana 44HD:
The medium version was the Dana 44HD TTB used on F250 trucks under 8500# GVWR. This system uses leaf springs for both suspension and locating the axle housings (i.e., there are no radius arms w/ the leaf springs). The medium version uses the same Dana 44 model differential. The axle housings for the Dana 44HD TTB are made of .250 wall steel and they are shorter and heavier than the light duty system. The pivot brackets are designed differently and attach to the front cross member in different locations than a Dana 44 TTB or 2WD truck. The 44HD system uses bigger steering knuckles, spindles, bearings, and hubs (8-lug) than the Dana 44. They cannot be interchanged. The only component interchangeable between the 44 and 44HD are the hubs and diff pumpkin.
The same axle housings are used for both the Dana 44HD and Dana 50 TTB systems, so the only difference between them (out to the spindles) is the differential. There were actually two different versions of the Dana 50 TTB. The lighter Dana 50 TTB used the same components as the Dana 44HD TTB on F250HDs from 1980 to 1983 or so. The heavier version used somewhat bigger axle shafts, u-joints, spindles, bearings, hubs, and hub lockouts on F350s and later model F250HDs.
Reverse rotation high pinion
Center section is steel
Ring Gear Diameter: 8.5"
Ring Gear Bolts: (10) 3/8" X 24RH
Cover Bolts: 10
Carrier Breaks: 3.73/3.92
Spline Count: 30
Pinion Support: False
Axle Lugs: 8x6.5
Dana 50:
The Dana/Spicer Model 50 is an automotive axle manufactured by Dana Corp. and has been used solely in OEM Ford applications. Dana 50's were made as front axles only. The Dana 50 has a "50" cast in to the housing and is regarded to have more strength than a Dana 44, but not as much as a Dana 60. The Dana 50 was made as a solid axle and as a Twin Traction Beam (TTB) which pivots in the center allowing the wheels to move independently of each other. A unique quality of the Dana 50 axle is the lack of variation in both TTB and Solid axle versions, which simplifies repairs and upgrades. There were no carrier breaks and only one spline count. Gross axle weight ratings were lowered by Ford for safety and tire reasons. This TTB was used in the Ford F-250 from 1980 to 1997. The TTB Dana 50 was also used selectively in the F-350 from 1980 to 1986. The GVW was lower in a F-350 with a TTB Dana 50, than a F-350 with a solid axle. The gross axle weight rating of a TTB Dana 50 was 4600 lbs.
* Ring gear measures 9.0".
* 30 Spline Axle shafts.
* Gear Ratios: 3.55:1 - 5.38:1
* No carrier breaks
* Pinion shaft diameter: 1.375"
* Pinion shaft splines: 26
* Axle shaft diameter: 1.21"
* Axle spline diameter: 1.31"
* Axle Lugs: 8x6.5
* Center section is steel
Information for this thread has been sourced from Wikipedia, my own knowledge, and various other websites and forums.
The Dana 28, 35, 44, 44HD, and 50.
Dana 28:
* 1983-1997 Ranger
* 1984-1990 Bronco II
* 1994-1997 Mazda B3000 + B4000
Ring Gear Diameter: 6.625
Ring Gear Bolts: (10) 3/8 x 24 RH
Cover Bolts: 12
Carrier Breaks: 3.45 / 3.73
Spline Count: 27
Pinion Support: False
Axle Lugs: 5x4.5
Center section is aluminum
Dana 35:
* Some 1990 Bronco IIs
* 1991-1994 Explorer
* 1990-1997 Ranger
* 1994-1997 Mazda B3000 + B4000
Dana 44:
1980-1996 1/2 Ton F150 & Bronco
Reverse rotation high pinion
Center section is steel
Ring Gear Diameter: 8.5"
Ring Gear Bolts: (10) 3/8" X 24RH
Cover Bolts: 10
Carrier Breaks: 3.73/3.92
Spline Count: 30
Pinion Support: False
Axle Lugs: 5x5.5
Dana 44HD:
The medium version was the Dana 44HD TTB used on F250 trucks under 8500# GVWR. This system uses leaf springs for both suspension and locating the axle housings (i.e., there are no radius arms w/ the leaf springs). The medium version uses the same Dana 44 model differential. The axle housings for the Dana 44HD TTB are made of .250 wall steel and they are shorter and heavier than the light duty system. The pivot brackets are designed differently and attach to the front cross member in different locations than a Dana 44 TTB or 2WD truck. The 44HD system uses bigger steering knuckles, spindles, bearings, and hubs (8-lug) than the Dana 44. They cannot be interchanged. The only component interchangeable between the 44 and 44HD are the hubs and diff pumpkin.
The same axle housings are used for both the Dana 44HD and Dana 50 TTB systems, so the only difference between them (out to the spindles) is the differential. There were actually two different versions of the Dana 50 TTB. The lighter Dana 50 TTB used the same components as the Dana 44HD TTB on F250HDs from 1980 to 1983 or so. The heavier version used somewhat bigger axle shafts, u-joints, spindles, bearings, hubs, and hub lockouts on F350s and later model F250HDs.
Reverse rotation high pinion
Center section is steel
Ring Gear Diameter: 8.5"
Ring Gear Bolts: (10) 3/8" X 24RH
Cover Bolts: 10
Carrier Breaks: 3.73/3.92
Spline Count: 30
Pinion Support: False
Axle Lugs: 8x6.5
Dana 50:
The Dana/Spicer Model 50 is an automotive axle manufactured by Dana Corp. and has been used solely in OEM Ford applications. Dana 50's were made as front axles only. The Dana 50 has a "50" cast in to the housing and is regarded to have more strength than a Dana 44, but not as much as a Dana 60. The Dana 50 was made as a solid axle and as a Twin Traction Beam (TTB) which pivots in the center allowing the wheels to move independently of each other. A unique quality of the Dana 50 axle is the lack of variation in both TTB and Solid axle versions, which simplifies repairs and upgrades. There were no carrier breaks and only one spline count. Gross axle weight ratings were lowered by Ford for safety and tire reasons. This TTB was used in the Ford F-250 from 1980 to 1997. The TTB Dana 50 was also used selectively in the F-350 from 1980 to 1986. The GVW was lower in a F-350 with a TTB Dana 50, than a F-350 with a solid axle. The gross axle weight rating of a TTB Dana 50 was 4600 lbs.
* Ring gear measures 9.0".
* 30 Spline Axle shafts.
* Gear Ratios: 3.55:1 - 5.38:1
* No carrier breaks
* Pinion shaft diameter: 1.375"
* Pinion shaft splines: 26
* Axle shaft diameter: 1.21"
* Axle spline diameter: 1.31"
* Axle Lugs: 8x6.5
* Center section is steel
Information for this thread has been sourced from Wikipedia, my own knowledge, and various other websites and forums.
Last edited by philofab on Wed Sep 22, 2010 3:55 pm, edited 8 times in total.
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- philofab
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
(Reserved for future expansion)
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- philofab
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
(Reserved for future expansion)
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- philofab
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
(Reserved for future expansion)
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- philofab
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Pictures.
Dana 44HD knuckle on the left, Dana 50 knuckle on the right
44HD spindle on the left, 50 spindle on the right.
The Dana 50 spindle is very close to a Dana 60 but not the same.
Hubs are the same.
Axle shafts are different
Here you can see the difference between a Dana 44HD (Above) and Dana 50 (Below). The Dana 50 is much thicker in diameter due to having a 2" snout vs. the 44HD having a 1.5 inch snout. Brake rotors are same diameter and appear the same. The 44HD takes a standard Dana 44 hub, while the 50 takes a 30 spline outer D50/D60 hub.
Dana 44HD knuckle on the left, Dana 50 knuckle on the right
44HD spindle on the left, 50 spindle on the right.
The Dana 50 spindle is very close to a Dana 60 but not the same.
Hubs are the same.
Axle shafts are different
Here you can see the difference between a Dana 44HD (Above) and Dana 50 (Below). The Dana 50 is much thicker in diameter due to having a 2" snout vs. the 44HD having a 1.5 inch snout. Brake rotors are same diameter and appear the same. The 44HD takes a standard Dana 44 hub, while the 50 takes a 30 spline outer D50/D60 hub.
Last edited by philofab on Mon Jan 03, 2011 8:02 pm, edited 3 times in total.
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Small Addition and correction that I see right away.
The D35 was in 1990-1/2 BroncoII's
There is no such thing as a 1990 Explorer. They started for the 1991 model year.
Carry on!
The D35 was in 1990-1/2 BroncoII's
There is no such thing as a 1990 Explorer. They started for the 1991 model year.
Carry on!
1987 BroncoII 4x4
- ChaseTruck754
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Also - didn't the exploder go A-arm in 95 = no Dana 35 TTB in them in 95-97. Rangers still had beams up to 97, but the spolders didn't.
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- philofab
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
I'll admit I know very little about the Explorer, Bronco II, and Ranger stuff. Keep it coming.
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- philofab
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Anyone have info on the TTB (Dana 50?) used in 99+ Superdutys? I haven't seen one just heard of them.
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- baja-chris
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
I think the D35 came on the Ranger in 92 with the intrduction of the 4.0l V6. This engine also got you an 8.8" rear instead of the 7.5" rear. The D35 and D28 were sold along side each other for a few years. I think all Explorers had the D35 until they went a-arm and I think all B-II were D28.
Trivia, for a go fast class 4 back in the day, the class rules required 4wd so some teams installed the tiny D28 for rule compliance with no plan to ever actually use 4wd. It was lighter and had better ground clearance than the D35 or D44.
Trivia, for a go fast class 4 back in the day, the class rules required 4wd so some teams installed the tiny D28 for rule compliance with no plan to ever actually use 4wd. It was lighter and had better ground clearance than the D35 or D44.
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Rough Riders team did that. I know the D28 is aluminum, what is the D35 made out of?baja-chris wrote:I think the D35 came on the Ranger in 92 with the intrduction of the 4.0l V6. This engine also got you an 8.8" rear instead of the 7.5" rear. The D35 and D28 were sold along side each other for a few years. I think all Explorers had the D35 until they went a-arm and I think all B-II were D28.
Trivia, for a go fast class 4 back in the day, the class rules required 4wd so some teams installed the tiny D28 for rule compliance with no plan to ever actually use 4wd. It was lighter and had better ground clearance than the D35 or D44.
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Here is correct info
D28 (common ratios 3.54, 3.73, 4.10)
1984-1989 ranger
1984-1990 1/2 Bronco II
D35 Hybrid (D35 beams D28 smooth housing diff)
1993 Ranger 4 cyl. common 4.10:1 ratio.
D35 (common ratios 3.27, 3.55, 3.73)
1990-1997 Ranger
1990 1/2 Bronco II
1991-1994 Explorer
1993-1997 B series Mazda
D28 (common ratios 3.54, 3.73, 4.10)
1984-1989 ranger
1984-1990 1/2 Bronco II
D35 Hybrid (D35 beams D28 smooth housing diff)
1993 Ranger 4 cyl. common 4.10:1 ratio.
D35 (common ratios 3.27, 3.55, 3.73)
1990-1997 Ranger
1990 1/2 Bronco II
1991-1994 Explorer
1993-1997 B series Mazda
1987 BroncoII 4x4
- SteveG
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Aluminum.philofab wrote:I know the D28 is aluminum, what is the D35 made out of?
Sho nuff,
SteveG
SteveG
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
There are no carrier breaks with the D28 or the D35 TTB.
1987 BroncoII 4x4
Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Never heard of a TTB D50 in the 99+ Superduties. They used D50s until '03 or so, but they were solid axles.philofab wrote:Anyone have info on the TTB (Dana 50?) used in 99+ Superdutys? I haven't seen one just heard of them.
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
The 250's had TTBtoddz69 wrote:Never heard of a TTB D50 in the 99+ Superduties. They used D50s until '03 or so, but they were solid axles.philofab wrote:Anyone have info on the TTB (Dana 50?) used in 99+ Superdutys? I haven't seen one just heard of them.
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
only 97 down. not 99 upChaseTruck754 wrote:The 250's had TTBtoddz69 wrote:Never heard of a TTB D50 in the 99+ Superduties. They used D50s until '03 or so, but they were solid axles.philofab wrote:Anyone have info on the TTB (Dana 50?) used in 99+ Superdutys? I haven't seen one just heard of them.
Todd Z.
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- philofab
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
Lots of conflicting info. Pics or it didn't happen.
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Re: TTB vs. THE WORLD (AKA differences between Ford TTB axles)
I swear I've seen TTB in the 99+ body style, but maybe I'm smoking something. Do the solid axle trucks have a 2 link front? I know I've seen some huge radius type arms on the things and I'm not talking on the 2wd stuff.
Trying to find a picture...
Trying to find a picture...
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